Sasami Sasasegawa is a student at Riki Naoe’s school and serves as Rin Natsume’s rival. Despite their frequent arguments, Sasami is genuinely interested in forming a friendship with Rin, though their opposing preferences Rin’s love for cats and Sasami’s strong affection for dogs often lead to comical clashes. As the captain of the girls’ softball team, Sasami is known for her assertive leadership, often sending in three of her teammates Yukari Nakamura, Rei Kawagoe, and Sakiko Watanabe before stepping in herself.

Her dislike of cats stems from a painful childhood experience involving the disappearance of her pet cat, Kuro. In her route, which takes place after the events of Refrain, it is revealed that Kuro had created a world mirroring the Little Busters’ universe around the school, allowing Sasami the chance to see him one final time before his passing. Additionally, her name is often noted for being a tongue twister so much so that even Sasami occasionally mispronounces it.

Sasami is an athletic girl with long, violet-colored hair styled in twin tails and light blue eyes. She wears the standard school uniform but distinguishes herself by pairing it with light purple stockings, setting her apart from the other female students.

Sasami is confident, outspoken, and often competitive, especially when it comes to her interactions with Rin Natsume. While she frequently bickers with Rin, she genuinely wishes to get along and values friendship, even if she struggles to express it directly. As the captain of the girls’ softball team, she takes on a leadership role and shows a strong sense of responsibility toward her teammates.

Despite her assertive and sometimes prideful attitude, Sasami has a softer, more emotional side, particularly revealed through her past with her pet cat, Kuro. This part of her personality comes to light in her story route, showing her vulnerability and capacity for deep emotional bonds.

• Rin Natsume: Sasami views Rin as her primary rival, often challenging her in various ways, especially through their differing preferences Sasami being a dog lover and Rin a cat enthusiast. Despite their frequent arguments, Sasami secretly wishes to become friends with Rin and often goes out of her way to interact with her, even if it leads to conflict.

• Kuro: Sasami’s relationship with her childhood cat, Kuro, reveals a more vulnerable and emotional side of her. The loss of Kuro during her youth left a lasting impact, influencing her feelings toward cats. In her route, the supernatural return of Kuro plays a central role, allowing her to find closure.

The given name Sasami (佐々美) is composed of the kanji 佐 (sa), meaning “help” or “aid,” and 美 (mi), meaning “beautiful.”

Her surname Sasasegawa (笹瀬川) combines the kanji 笹 (sasa), meaning “bamboo grass,” 瀬 (se), meaning “swift current” or “rapids,” and 川 (kawa/gawa), meaning “river” or “stream.”